Re: Safty cap and first light

to: Bill

Not enough primary for initial test with this large toroid.  Use some scrap
12 AWG wire and 22-24 total turns.  Tap as necessary until you find the
resonant point.   Go back to the pretty copper tubing later --- after it



-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Friday, June 11, 1999 3:29 PM
Subject: Safty cap and first light

>Original Poster: Bill Fuller <wfuller-at-home-dot-com>
>Well, after many months of seaching for parts and construction, I fired
>up my coil last night for the first time. No arcs!  I'm not sure where I
>got the idea, but I have a safety gap across the primary cap (~0.6"). As
>soon as my RQ air blast gap starts to fire(90v on the variac), so does
>the safety gap. The RQ gap is set at 0.3".  No amount of tuning fixes
>the problem. I did a search in the list archives and it seems unclear if
>this safety gap is needed. (I already have a safety gap and RC filter on
>the NST's). Any idea's?  Here's the coil spec's:
>15KV NST's at 90 mA (plan to use 150mA)
>8" dia secondary 32" long 19 ga wire (29mH)
>28" x 7" toroid
>Flat plate primary cap 0.026 uF
>10 deg. primary inductor 12 turns 1/4 tubing, 1/4" spacing (66uH)
>I know the cap is on the large side for 90 mA. I don't think this is an
>issue though.
>Thanks for your help, can't wait to get back to it tomorrow!
>Bill Fuller